Having a very similar issue to what was discussed here in a previous thread:
Tried the suggested fixes, including editing the connection and the chmod,
Still end up with this.
Last login: Sun Feb 18 03:42:31 on ttys000
Mac-mini-2:~ martylappin$ ./cayenne-ser.sh
-bash: ./cayenne-ser.sh: No such file or directory
Mac-mini-2:~ martylappin$ sudo ./cayenne-ser.sh
Sorry, try again.
sudo: ./cayenne-ser.sh: command not found
Using a Arduino Uno on a Mac Mini running the newest OS update, using Safari.